As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 5124 - FHU-PHX - DURING FINAL APPROACH, THE CAPTAIN NOTICED SMOKE COMING OUT OF THE AIR VENT UNDER THE F/O'S SEAT. THE CREW SELECTED BLEEDS OFF AND LANDED IN PHX WITH NO FURTHER INCIDENT. MAINTENANCE INSPECTED THE DUCTING AND THE VENT BLOWER. PERFORMED ENGINE RUNS FOR 20 MINUTES, NO DISCREPANCIES NOTED. AIRCRAFT WAS RETURNED TO SERVICE. (M)